AUSTIN — At least two aides to Gov. Rick Perry testified Friday before the grand jury looking into whether he abused his powers by threatening a veto last year, special prosecutor Michael McCrum confirmed.

McCrum wouldn’t identify the two men, who declined to comment as they left a Travis County Courthouse. The prosecutor also declined to say whether a third aide, Perry legislative lobbyist Ken Armbrister, testified before the panel.

Armbrister spent about 25 minutes Friday behind a taped-over door that blocks views of who is entering a room where the grand jury meets. He left without commenting.

McCrum, a former federal prosecutor from San Antonio, said he has no plans to call Perry to testify.

He hastened to add that that could change, if new facts emerge.

“I never rule out calling anyone before the grand jury. It’s just that there’s no plans at this time” to seek Perry’s testimony, he said.

A state judge tapped McCrum to look into a campaign finance watchdog group’s complaint that Perry overstepped his bounds in trying to force Travis County District Attorney Rosemary Lehmberg to resign last year.

Perry threatened to veto funding of a state public integrity unit overseen by Lehmberg, who two months earlier had been arrested on a charge of drunken driving, if she didn’t step down.

At the time, many Republicans and even a few Democrats demanded that Lehmberg quit. Tests showed her blood alcohol level was nearly three times the legal limit. A videotape captured her ranting and invoking her political connections as she was booked at the Travis County Jail.

Lehmberg refused to step down, though she decided not to run for re-election. Some Democrats have said Perry was trying to throttle the unit’s investigation of improprieties surrounding the cancer research fund he pushed to create. Perry, though, has insisted he acted merely because Lehmberg had “lost the public’s confidence.”

Perry vetoed the money, forcing Travis County commissioners to scramble to partially offset the loss with county funds. Some of the unit’s work has been pared. Several reports have indicated that after Perry canceled funding, aides continued to offer to restore it if Lehmberg resigned.